Zipper Strap Structure for Accurate Sealing and Closure Feedback
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Solution Overview
Problem
Existing zipper structures in plastic bags are prone to malfunction due to inaccurate molding, complexity, and increased manufacturing costs, especially when additional features like sound generation are introduced, leading to difficulties in sealing and opening.
Innovation Solution
A zipper strap structure with an internal coupling unit and external coupling unit, featuring a central separation groove and alternating head portions of varying heights, allows precise coupling and decoupling with tactile and auditory feedback, ensuring effective sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a zipper is made of flexible plastic material with internal and external parts meshing, then the zipper can be sealed and opened, but inaccurate molding causes difficulty in sealing or opening
Solution Approach 1:
The zipper is divided into separate first strap and second strap components, each with distinct coupling units. The internal coupling unit on the first strap and external coupling unit on the second strap are segmented into discrete elements (column portion, head portion, latching protrusions, wall portions, hook portions) that can be independently formed and assembled, reducing the impact of molding inaccuracies on overall functionality.
Solution Approach 2:
Different regions of the zipper components have specialized local structures optimized for their specific functions. The head portion has latching protrusions for engagement, the wall portions create an accommodation space, and the hook portions provide coupling. This local specialization ensures that each area contributes to reliable operation even if overall molding varies slightly.
2Ease of operation
If additional features like sound generation are added to the zipper, then user feedback is improved, but the structure becomes more complex and manufacturing costs increase
Solution Approach 1:
The sound generation function is merged into the existing coupling mechanism. When the hook portions engage with the latching protrusions or when the straps are pulled apart, the structured interaction between the column portion, head portion, and wall portions naturally generates audible clicking sounds and tactile feedback. No separate sound-generating components are needed.
Solution Approach 2:
The coupling units serve multiple functions simultaneously: they provide mechanical interlocking for sealing, generate audible feedback through the interaction of structured surfaces, and offer tactile feedback through the geometric features. The same structural elements (latching protrusions, hook portions, accommodation space) fulfill both mechanical and sensory feedback roles.
3Adaptability or versatility
If the zipper structure is made more complex to add additional functions, then functionality is improved, but malfunction of zipper opening or closing becomes more likely
Solution Approach 1:
The zipper structure is designed to be self-sufficient and self-checking. The internal and external coupling units automatically engage and disengage through their geometric features (latching protrusions and hook portions) without requiring external actuators or complex control mechanisms. The structure inherently guides the opening and closing motion, reducing the likelihood of malfunction.
Data Source
AI summary
A zipper strap structure according to an embodiment includes a first strap, a second strap disposed side by side with the first strap, an internal coupling unit, and an external coupling unit. According to the invention, the internal and external coupling of the zipper strap structure is performed with very high accuracy and precision. In addition, when the zipper strap structure is operated, a user can intuitively recognize whether the zipper strap structure is opened or closed by senses of touch and hearing. Since a user can effectively seal contents by the internal and external coupling of the zipper strap structure and can clearly recognize an operation state of the zipper by senses of touch and hearing, the user does not have to perform repeated checking of whether or not a zipper is completely closed, unlike the related art.